Till and terminal need to communicate together via six different ports (listed in the table on the next page) so you need to check that these are not blocked by firewall rules or any security and anti-virus software used on your till system.
The MAC address of the terminalcan be provided at the time of installation if requiredįor firewall configuration. Your firewall configuration needs to include a DNS address access. If a secondary DNS address is not known, a public DNS can be used. You will require two DNS server addresses for Tetra terminals. It is recommended that DNS1 and DNS2 are populated.
If using DHCPĮnsure a correct DNS1 and DNS2 address is passed from the router / DHCP server.
So when it comes to taking payments it’s essential to check with your internet provider that the associated ports and IP addresses are allowed, as shown in the table on the next page. When data is sent or received over the internet, it is sent to an IP (Internet Protocol) address and a specific port.
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